what sound does jimmy fallon parody in his troll doll song?

Question by Chris G: what sound does jimmy fallon parody in his troll doll song?
the lyrics are:
(Jimmy Fallon as Alanis Morisette)
I wanted a Troll Doll
but I didn’t have money to pay for it.
So we decided to steal it,
A five-finger discount
And run for it.
But you, you got away
I was indicted
Because of a Troll Doll